[OPTICAL REVIEW Vol. 9, No. 1 (2002) 29-32]

Fiber to the Classrooms: Internet over Fiber Optical CATV System

Hai-Han LU*

1Department of Photonics, National Taipei University of Technology, Taipei, 10626, Taiwan, Republic of China

(Received April 16, 2001; Accepted November 5, 2001)

This study proposed and demonstrated a directly modulated NTSC AM-VSB 77-channel plus Internet access system using a Fabry--Perot (FP) laser diode, an optical isolator, fiber Bragg grating (FBG), wavelength-division-multiplexing (WDM), channel conversion and two-way communication techniques over an existing multimode fiber (MMF) on the author's campus. Performances of carrier-to-noise ratio (CNR) of >43 dB composite second order (CSO) of >53 dB and composite triple beat (CTB) of >53 dB were obtained over a 2-km MMF transmission. The proposed two-way communication system is simple and suitable for fiber to the classrooms application.

Key words: Fabry--Perot laser diode, fiber Bragg grating, two-way communication, wavelength-division-multiplexing